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Published on: January 5, 2017
MRI-based Middle Neck Involvement in Stage N1-N2 Nasopharyngeal Carcinoma: A Marker for Risk Stratification.
Guan-Jie Qin1, Wei Jiang1, Wu-Qi Zhang1
1Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, No. 651 Dongfeng East Rd, Yuexiu District, Guangzhou 510060, China.
Middle neck involvement is a key prognostic factor in nasopharyngeal carcinoma (NPC) patients with N1 or N2 disease. This finding aids in better risk stratification for improved patient outcomes.
Area of Science:
- Oncology
- Radiology
- Head and Neck Surgery
Background:
- The prognostic significance of middle neck involvement in nasopharyngeal carcinoma (NPC) remains unclear.
- Middle neck involvement is defined as cervical lymph node metastasis between the hyoid bone and cricoid cartilage.
Purpose of the Study:
- To investigate the prognostic significance of middle neck involvement in patients with N1 or N2 NPC.
- To determine if middle neck involvement impacts survival outcomes in NPC.
Main Methods:
- Retrospective analysis of 9795 patients with N1 or N2 NPC without distant metastasis.
- Patients were categorized based on the presence or absence of middle neck involvement on MRI.
- Survival analysis included TN category and middle neck involvement, using Kaplan-Meier curves and log-rank tests.
Main Results:
- Middle neck involvement was present in 17.0% of patients, with higher prevalence in N2 (34.7%) than N1 (11.4%) NPC.
- Middle neck involvement independently predicted reduced metastasis-free survival, overall survival, and disease-free survival in both N1 and N2 subgroups.
- Patients with T1-T2 N1 NPC and middle neck involvement had similar outcomes to T1-T2 N2 NPC; T3N1 NPC without middle neck involvement showed better survival.
Conclusions:
- Middle neck involvement is a critical factor for risk stratification in N1 and N2 NPC.
- It helps identify high-risk patients within the T1-T2 N1 subgroup and those with T3N1 disease.
- This finding can refine treatment strategies and prognostication for NPC patients.
